<template>
  <div class="my-tab-bar">
  	<div class="tab-item" 
    :class='{current:index === active}' 
    v-for="(item,index) in list"
    :key="item.id"
    @click="fn(index,item.componentName)"  

    >
      <!-- 图标 -->
      <span class="iconfont" :class="item.iconText"></span>
      <!-- 文字 -->
      <span>{{item.text}}</span>
    </div>
  </div>
</template>

<script>
export default {
  props:{
     list:{
       type:Array,
       required:true,
      //  自动校验数据长度
       validator(val){
        if(val.length >= 2 && val.length <= 5) {
            return true; // 符合条件就return true
        } else {
          console.error("数据源必须在2-5项")
          return false;  // 不符合条件就return false
        }
      }
    }
  },
  data(){
     return {
       active:0,
    }
  },
  methods:{
    fn(index,name){
      this.active = index
      this.$emit('tab',name)
    }
  }
}
</script>

<style lang="less" scoped>
.my-tab-bar {
  position: fixed;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 50px;
  border-top: 1px solid #ccc;
  display: flex;
  justify-content: space-around;
  align-items: center;
  background-color: white;
  .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
}
    
.current {
  color: #1d7bff;
}
</style>